MIL-B-2680, MILITARY SPECIFICATION: BUOYS, ANCHOR, SPAR (23-AUG-1951) [NO S/S DOCUMENT]

MIL-B-2680, MILITARY SPECIFICATION: BUOYS, ANCHOR, SPAR (23-AUG-1951) [NO S/S DOCUMENT]., The Spar anchor buoys covered by this specification shall be of but one type, as hereinafter described and as illustrated by figure 1.